At least 4 ea UVC grabber capture card work on PC at the same time (plug and play / No software driver)

At least 4 ea  UVC grabber capture card work on Windows PC at the same time

All of them are plug and play (No software driver )

The PC is not Powerful.

CPU is just  Intel Pentium® cpu  U5400 @1.2Ghz

I had also test ASUS  Eee PC

At least 3 ea uvc grabber card can work on Eee PC at the same time. 

The video clip show 4 ea UVC grabber card work on PC at the same time.